It was okay. It was recommended to me as a post-apocalyptic book which was, but only in the loosest sense. The feudal society was interesting but there was way
too much focus on Aikido. It was almost like a religion. Gould used a lot of technical terms that I'm sure would be familiar to practitioners of Aikido but weren't really explained very well in the book so I had to infer their meaning. The descriptions of the moves were confusing and not particular interesting to read.
The actual story was interesting though.